From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754400AbZJ2OKX (ORCPT ); Thu, 29 Oct 2009 10:10:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754369AbZJ2OKW (ORCPT ); Thu, 29 Oct 2009 10:10:22 -0400 Received: from e6.ny.us.ibm.com ([32.97.182.146]:60696 "EHLO e6.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754344AbZJ2OKV (ORCPT ); Thu, 29 Oct 2009 10:10:21 -0400 Date: Thu, 29 Oct 2009 07:10:18 -0700 From: "Paul E. McKenney" To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca, josh@joshtriplett.org, dvhltc@us.ibm.com, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, Valdis.Kletnieks@vt.edu, dhowells@redhat.com Subject: Re: [PATCH tip/core/rcu 0/2] RCU force_quiescent_state() fix and dyntick cleanup Message-ID: <20091029141018.GA6897@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20091028151419.GA7838@linux.vnet.ibm.com> <20091029090537.GB22963@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20091029090537.GB22963@elte.hu> User-Agent: Mutt/1.5.15+20070412 (2007-04-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 29, 2009 at 10:05:37AM +0100, Ingo Molnar wrote: > > * Paul E. McKenney wrote: > > > This patch series contains a cleanup and a fix: > > > > o Code cleanup from Lai Jiangshan that makes the calls to > > rcu_irq_enter() and rcu_irq_exit() more obviously correct. > > The previous code worked because rcu_irq_exit() is always > > an empty function if !NO_HZ. > > Can go via tip:core/rcu, agreed? Agreed. > > o Fix a low-probability race in the TREE_RCU infrastructure > > that can be triggered by extremely long grace periods. > > Should go via tip:core/urgent as it's a fix for .32, agreed? Also agreed. Thanx, Paul